Literature DB >> 30002894

Crystal structure and theoretical study of (2E)-1-[4-hy-droxy-3-(morpholin-4-ylmeth-yl)phen-yl]-3-(thio-phen-2-yl)prop-2-en-1-one.

Fatma Yesilyurt1, Abdullah Aydin2, Halise Inci Gul1, Mehmet Akkurt3, Nefise Dilek Ozcelik4.   

Abstract

In the title compound, C18H19NO3S, the morpholine ring adopts a chair conformation. The thio-phene ring forms dihedral angles of 26.04 (9) and 74.07 (10)° with the benzene ring and the mean plane of the morpholine ring, respectively. The mol-ecular conformation is stabilized by an O-H⋯N hydrogen bond. In the crystal, mol-ecules are connected through C-H⋯O hydrogen bonds, forming wave-like layers parallel to the ab plane, which are further linked into a three-dimensional network by C-H⋯π inter-actions involving the benzene rings and the methyl-ene H atoms of the morpholine rings.

Entities:  

Keywords:  HOMO; LUMO; Mannich bases; chalcones; crystal structure; quantum-chemical calculation; theoretical study

Year:  2018        PMID: 30002894      PMCID: PMC6038634          DOI: 10.1107/S2056989018008459

Source DB:  PubMed          Journal:  Acta Crystallogr E Crystallogr Commun


Chemical context

Chalcones, viz 1,3-diaryl-2-propene-1-ones, are major component of many natural products as well as important precursors for many synthetic manipulations (Das et al., 2006 ▸; Yerdelen et al., 2015 ▸; Gul et al., 2009 ▸). Chalcones and their synthetic analogues display a wide range of biological activities such as anti­cancer, anti­malarial, anti­bacterial, anti-inflammatory, anti­fungal, anti­oxidant, anti-HIV, anti­protozoal, and carbonic anhydrase inhibiting activities (Das et al., 2006 ▸; Yerdelen et al., 2015 ▸; Gul et al., 2007 ▸, 2009 ▸; Bilginer et al., 2013 ▸, 2014 ▸; Yamali et al., 2016 ▸; Singh et al., 2014 ▸). Mannich bases are an important class of compounds in medicinal chemistry. The Mannich reaction can be considered as a substitution reaction of a suitable compound in which one or more amino­methyl­ation processes happen, depending on the nature of the reactants. The biological activities of Mannich bases may result from their chemical structures or from the production of α,β-unsaturated ketone moieties (Roman, 2015 ▸). The title compound was designed with the expectation of observing an increased bioactivity or cytotoxicity in a mol­ecule including both chalcone and Mannich base pharmakophores.

Structural commentary

In the title compound (Fig. 1 ▸), the morpholine ring (N1/O3/C15–C18) adopts a chair conformation with puckering parameters Q T = 0.5776 (18) Å, θ = 0.00 (19)°, φ = 308 (12)°. The benzene ring (C8–C13) forms dihedral angles of 26.04 (9) and 79.95 (8)° with the thio­phene ring (S1/C1–C4) and the mean plane of the morpholine ring, respectively. The values of all bond lengths and angles in the title compound are unexceptional. The mol­ecular conformation is enforced by an intra­molecular O—H⋯N hydrogen bond (Table 1 ▸).
Figure 1

The mol­ecular structure of the title compound with displacement ellipsoids drawn at the 30% probability level

Table 1

Hydrogen-bond geometry (Å, °)

Cg1 is the centroid of the C8–C13 benzene ring.

D—H⋯A D—HH⋯A DA D—H⋯A
O2—H1O⋯N10.83 (2)1.94 (2)2.6834 (18)149 (3)
C1—H1⋯O1i 0.932.383.249 (2)156
C2—H2⋯O2ii 0.932.573.417 (2)152
C16—H16ACg1iii 0.972.883.789 (2)157
C18—H18BCg1iv 0.972.703.6010 (18)154

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .

Supra­molecular features

In the crystal, mol­ecules are linked by inter­molecular C—H⋯O hydrogen bonds, forming wave-like layers parallel to the ab plane (Table 1 ▸, Fig. 2 ▸). C—H⋯π inter­actions are observed between the benzene rings and the methyl­ene hydrogen atoms of the morpholine rings in adjacent layers, forming a three-dimensional network.
Figure 2

The mol­ecular packing of the title compound viewed down the a axis. Hydrogen bonds are shown as dashed lines.

Database survey

A search of the Cambridge Structural Database (Version 5.39, update May 2018; Groom et al., 2016 ▸) for the 2-(morph­olino­meth­yl)phenol substructure yielded two hits, namely BOPMEY (Fun et al., 1999 ▸) and IHUBIW (Xie et al., 2003 ▸). In both compounds, the amine N atoms of the morpholine rings and the hy­droxy groups of the phenol fragments are engaged in intra­molecular hydrogen bonds.

Theoretical calculations

A quantum-chemical calculation was performed using the CNDO (Complete Neglect of Differential Overlap; Pople & Beveridge, 1970 ▸) approximation. A view of the calculated mol­ecule is shown in Fig. 3 ▸. The charges at atoms S1, O1, O2, O3 and N1 are −0.049, −0.336, −0.271, −0.224 and −0.145 e−, respectively. The calculated dipole moment of the title mol­ecule is ca 2.881 Debye. The HOMO and LUMO energy levels are −10.3681 and 1.4009 eV, respectively.
Figure 3

Spatial view of the title compound calculated using the CNDO method.

In addition, the geometrical optimization calculations of the title compound were performed using the PM3 (Parameterized Model number 3) method (Stewart, 1989 ▸) in WinMopac7.2. A view of the mol­ecule calculated with PM3 is shown in Fig. 4 ▸. The net charges at atoms S1, O1, O2, O3 and N1 are 0.321, −0.230, −0.260, −0.321 and −0.070 e−, respectively. The calculated dipole moment of the title mol­ecule is ca 1.176 Debye. The HOMO and LUMO energy levels are −0.1724 and 0.0829 eV, respectively. These calculations were performed assuming the mol­ecule to be isolated and in an absolute vacuum. A comparison between experimental and calculated bond lengths (r.m.s. deviations of 0.029 and 0.016 Å for CNDO and PM3, respectively) and angles (r.m.s. deviations of 1.601 and 1.915° for CNDO and PM3, respectively) is given in Table 2 ▸. The PM3 method gave the lowest values for HOMO, LUMO and dipole moments.
Figure 4

Spatial view of the title compound calculated using the PM3 method

Table 2

Comparison of experimental (X-ray), theoretical (CNDO and PM3) parameters (Å, °) of the title compound

Bond/AngleX-ray CNDO PM3
S1—C11.705 (2)1.76631.7194
S1—C41.720 (2)1.77581.7449
O1—C71.224 (2)1.21431.2196
O2—C111.354 (2)1.35651.3663
O3—C161.419 (2)1.42081.4149
O3—C171.422 (2)1.42091.4153
N1—C141.472 (2)1.46061.4916
N1—C151.469 (2)1.45731.4914
N1—C181.469 (2)1.45671.4906
    
C1—S1—C492.20 (9)88.9191.38
C16—O3—C17109.29 (13)110.44112.79
C14—N1—C15111.86 (13)111.15112.06
C14—N1—C18110.61 (13)111.92112.86
C15—N1—C18109.09 (13)109.64111.62
S1—C1—C2111.75 (15)111.11112.58
S1—C4—C5123.58 (12)126.03125.76
S1—C4—C3109.79 (12)109.88111.11
O1—C7—C6120.42 (14)119.03122.82
O1—C7—C8119.90 (14)123.49121.52
O2—C11—C10118.59 (14)119.87115.22
O2—C11—C12121.18 (14)122.06123.98
N1—C14—C12112.14 (12)112.35111.21
N1—C15—C16109.98 (14)110.79109.89
O3—C16—C15111.42 (17)109.89112.44
O3—C17—C18111.22 (14)110.05112.30
N1—C18—C17109.80 (15)110.73110.02

Synthesis and crystallization

A mixture of paraformaldehyde (0.13 g, 4.3 mmol) and morpholine (0.37 g, 4.3 mmol) in aceto­nitrile (5 ml) was refluxed at 353 K for 30 min. A solution of a suitable chalcone in aceto­nitrile (25 ml), [1-(4-hy­droxy­phen­yl)-3-(thio­phene-2-yl)-2-propene-1-one (1 g, 4.3 mmol)], was added into the reaction flask under continuous heating. The reaction progress was monitored by TLC. The reaction stopped after 8 h when the chalcone compound was consumed in the reaction medium, and the solvent was removed under vacuum. The residue was purified by column chromotography (SiO2; CHCl3: MeOH 9:1 v/v). Yield 32%, m.p. 424–426 K. Crystals suitable for X-ray analysis were obtained by slow evaporation of a methanol solution.

Refinement details

Crystal data, data collection and structure refinement details are summarized in Table 3 ▸. C-bound H atoms were placed in calculated positions with C—H = 0.93–0.97 Å and refined using a riding model with U iso(H) = 1.2U eq(C). The hy­droxy H atom was found in a difference-Fourier map and refined with U iso(H) = 1.5U eq(O). 15 outliers (5 4 6, 14 1, 5 3 2, 3 4 2, 3 1, 16 4, 11 1, 7 9, 11 1, 2 2 10, 0 5 12, 13 1, 13 3, 0 15 4, 17 4) were omitted in the final cycles of refinement.
Table 3

Experimental details

Crystal data
Chemical formulaC18H19NO3S
M r 329.40
Crystal system, space groupMonoclinic, P21/n
Temperature (K)293
a, b, c (Å)9.4939 (5), 18.5548 (10), 9.5068 (5)
β (°)96.788 (3)
V3)1662.95 (15)
Z 4
Radiation typeMo Kα
μ (mm−1)0.21
Crystal size (mm)0.81 × 0.50 × 0.48
 
Data collection
DiffractometerBruker APEXII CCD
Absorption correctionMulti-scan (SADABS; Bruker, 2007)
T min, T max 0.882, 0.905
No. of measured, independent and observed [I > 2σ(I)] reflections33902, 4168, 3373
R int 0.033
(sin θ/λ)max−1)0.670
 
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S 0.050, 0.138, 1.03
No. of reflections4168
No. of parameters211
No. of restraints1
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3)0.32, −0.25

Computer programs: APEX2 and SAINT (Bruker, 2007 ▸), SHELXS2014 (Sheldrick, 2008 ▸), SHELXL2014 (Sheldrick, 2008 ▸), ORTEP-3 for Windows (Farrugia, 2012 ▸) and PLATON (Spek, 2009 ▸).

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S2056989018008459/rz5238sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989018008459/rz5238Isup4.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S2056989018008459/rz5238Isup3.cml CCDC reference: 1848116 Additional supporting information: crystallographic information; 3D view; checkCIF report
C18H19NO3SF(000) = 696
Mr = 329.40Dx = 1.316 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
a = 9.4939 (5) ÅCell parameters from 9868 reflections
b = 18.5548 (10) Åθ = 2.2–28.4°
c = 9.5068 (5) ŵ = 0.21 mm1
β = 96.788 (3)°T = 293 K
V = 1662.95 (15) Å3Prism, colourless
Z = 40.81 × 0.50 × 0.48 mm
Bruker APEXII CCD diffractometer4168 independent reflections
Radiation source: sealed tube3373 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.033
φ and ω scansθmax = 28.5°, θmin = 2.2°
Absorption correction: multi-scan (SADABS; Bruker, 2007)h = −12→12
Tmin = 0.882, Tmax = 0.905k = −24→24
33902 measured reflectionsl = −12→12
Refinement on F21 restraint
Least-squares matrix: fullHydrogen site location: mixed
R[F2 > 2σ(F2)] = 0.050H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.138w = 1/[σ2(Fo2) + (0.0679P)2 + 0.4859P] where P = (Fo2 + 2Fc2)/3
S = 1.03(Δ/σ)max < 0.001
4168 reflectionsΔρmax = 0.32 e Å3
211 parametersΔρmin = −0.25 e Å3
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
xyzUiso*/Ueq
C10.3316 (2)−0.02309 (12)0.2121 (3)0.0720 (6)
H10.235465−0.0198630.2218730.086*
C20.3860 (2)−0.06817 (11)0.1231 (2)0.0623 (5)
H20.331381−0.0997900.0634330.075*
C30.53423 (18)−0.06285 (9)0.12897 (19)0.0522 (4)
H30.587701−0.0904380.0731640.063*
C40.59198 (16)−0.01301 (8)0.22504 (17)0.0441 (3)
C50.74016 (16)0.00373 (8)0.25820 (17)0.0447 (3)
H50.802258−0.0225980.2095310.054*
C60.79903 (17)0.05204 (9)0.34953 (18)0.0465 (4)
H60.7416870.0802540.4002490.056*
C70.95402 (16)0.06168 (8)0.37183 (17)0.0433 (3)
C81.01520 (15)0.12698 (8)0.44638 (15)0.0398 (3)
C90.93436 (16)0.18710 (8)0.47309 (16)0.0435 (3)
H90.8366710.1863780.4480480.052*
C100.99807 (17)0.24766 (8)0.53638 (17)0.0456 (3)
H100.9431570.2876580.5525220.055*
C111.14360 (16)0.24932 (8)0.57615 (15)0.0410 (3)
C121.22777 (15)0.18990 (8)0.54966 (15)0.0390 (3)
C131.16227 (15)0.13017 (8)0.48509 (15)0.0397 (3)
H131.2174890.0906580.4665890.048*
C141.38542 (17)0.19118 (9)0.59817 (18)0.0473 (4)
H14A1.4010570.1812640.6989850.057*
H14B1.4314230.1534400.5497280.057*
C151.45567 (19)0.27260 (10)0.41787 (17)0.0533 (4)
H15A1.3603090.2722160.3683030.064*
H15B1.5088510.2339300.3801830.064*
C161.5255 (2)0.34382 (12)0.3944 (2)0.0645 (5)
H16A1.5298840.3506540.2938660.077*
H16B1.4689020.3825120.4271160.077*
C171.65806 (19)0.33755 (12)0.6150 (2)0.0603 (5)
H17A1.6014850.3758270.6493250.072*
H17B1.7529020.3406690.6652650.072*
C181.59421 (16)0.26603 (10)0.64480 (18)0.0507 (4)
H18A1.6523430.2275140.6137630.061*
H18B1.5910620.2607450.7458940.061*
N11.45003 (13)0.26102 (7)0.56999 (13)0.0425 (3)
O11.03248 (13)0.01683 (7)0.32762 (15)0.0605 (3)
O21.20139 (14)0.30917 (7)0.64087 (14)0.0548 (3)
O31.66467 (14)0.34704 (8)0.46745 (15)0.0686 (4)
S10.45988 (5)0.02779 (3)0.30547 (7)0.0781 (2)
H1O1.2875 (19)0.3090 (18)0.633 (3)0.117*
U11U22U33U12U13U23
C10.0407 (9)0.0815 (14)0.0932 (15)0.0020 (9)0.0062 (9)−0.0139 (12)
C20.0505 (10)0.0600 (11)0.0743 (13)−0.0078 (8)−0.0017 (9)−0.0083 (9)
C30.0508 (9)0.0475 (9)0.0585 (10)0.0007 (7)0.0072 (7)−0.0053 (7)
C40.0416 (8)0.0406 (8)0.0499 (8)0.0049 (6)0.0046 (6)0.0006 (6)
C50.0417 (8)0.0414 (7)0.0515 (8)0.0031 (6)0.0073 (6)0.0028 (6)
C60.0419 (8)0.0443 (8)0.0538 (9)0.0012 (6)0.0084 (7)−0.0019 (7)
C70.0426 (8)0.0413 (8)0.0470 (8)−0.0013 (6)0.0094 (6)0.0031 (6)
C80.0394 (7)0.0408 (7)0.0405 (7)−0.0009 (6)0.0098 (6)0.0044 (6)
C90.0370 (7)0.0476 (8)0.0472 (8)0.0017 (6)0.0102 (6)0.0029 (6)
C100.0451 (8)0.0430 (8)0.0505 (9)0.0060 (6)0.0132 (7)−0.0018 (6)
C110.0468 (8)0.0414 (7)0.0359 (7)−0.0002 (6)0.0086 (6)0.0015 (6)
C120.0388 (7)0.0417 (7)0.0367 (7)0.0007 (6)0.0052 (6)0.0066 (6)
C130.0401 (7)0.0372 (7)0.0427 (7)0.0034 (6)0.0090 (6)0.0049 (6)
C140.0427 (8)0.0468 (8)0.0509 (9)0.0011 (6)−0.0012 (6)0.0040 (7)
C150.0532 (9)0.0672 (11)0.0389 (8)−0.0119 (8)0.0035 (7)−0.0032 (7)
C160.0651 (11)0.0769 (13)0.0532 (10)−0.0191 (10)0.0138 (8)0.0029 (9)
C170.0433 (9)0.0802 (13)0.0587 (10)−0.0145 (8)0.0114 (7)−0.0211 (9)
C180.0379 (8)0.0673 (11)0.0461 (8)0.0016 (7)0.0016 (6)−0.0121 (7)
N10.0376 (6)0.0507 (7)0.0388 (6)−0.0043 (5)0.0032 (5)−0.0020 (5)
O10.0456 (6)0.0539 (7)0.0837 (9)0.0002 (5)0.0151 (6)−0.0174 (6)
O20.0554 (7)0.0482 (6)0.0605 (7)−0.0024 (5)0.0059 (6)−0.0127 (5)
O30.0540 (7)0.0911 (10)0.0646 (8)−0.0251 (7)0.0234 (6)−0.0133 (7)
S10.0495 (3)0.0889 (4)0.0965 (4)0.0074 (2)0.0111 (3)−0.0427 (3)
C1—C21.336 (3)C11—C121.402 (2)
C1—S11.705 (2)C12—C131.379 (2)
C1—H10.9300C12—C141.513 (2)
C2—C31.406 (2)C13—H130.9300
C2—H20.9300C14—N11.472 (2)
C3—C41.368 (2)C14—H14A0.9700
C3—H30.9300C14—H14B0.9700
C4—C51.439 (2)C15—N11.469 (2)
C4—S11.7197 (16)C15—C161.507 (3)
C5—C61.325 (2)C15—H15A0.9700
C5—H50.9300C15—H15B0.9700
C6—C71.473 (2)C16—O31.419 (2)
C6—H60.9300C16—H16A0.9700
C7—O11.2239 (19)C16—H16B0.9700
C7—C81.487 (2)C17—O31.422 (2)
C8—C91.394 (2)C17—C181.500 (3)
C8—C131.403 (2)C17—H17A0.9700
C9—C101.380 (2)C17—H17B0.9700
C9—H90.9300C18—N11.4691 (19)
C10—C111.389 (2)C18—H18A0.9700
C10—H100.9300C18—H18B0.9700
C11—O21.3538 (19)O2—H1O0.830 (18)
C2—C1—S1111.75 (15)C8—C13—H13118.9
C2—C1—H1124.1N1—C14—C12112.14 (12)
S1—C1—H1124.1N1—C14—H14A109.2
C1—C2—C3113.02 (18)C12—C14—H14A109.2
C1—C2—H2123.5N1—C14—H14B109.2
C3—C2—H2123.5C12—C14—H14B109.2
C4—C3—C2113.24 (16)H14A—C14—H14B107.9
C4—C3—H3123.4N1—C15—C16109.98 (14)
C2—C3—H3123.4N1—C15—H15A109.7
C3—C4—C5126.63 (15)C16—C15—H15A109.7
C3—C4—S1109.79 (12)N1—C15—H15B109.7
C5—C4—S1123.58 (12)C16—C15—H15B109.7
C6—C5—C4127.99 (15)H15A—C15—H15B108.2
C6—C5—H5116.0O3—C16—C15111.42 (17)
C4—C5—H5116.0O3—C16—H16A109.3
C5—C6—C7120.90 (15)C15—C16—H16A109.3
C5—C6—H6119.6O3—C16—H16B109.3
C7—C6—H6119.6C15—C16—H16B109.3
O1—C7—C6120.42 (14)H16A—C16—H16B108.0
O1—C7—C8119.90 (14)O3—C17—C18111.22 (14)
C6—C7—C8119.67 (13)O3—C17—H17A109.4
C9—C8—C13118.09 (14)C18—C17—H17A109.4
C9—C8—C7123.12 (14)O3—C17—H17B109.4
C13—C8—C7118.69 (13)C18—C17—H17B109.4
C10—C9—C8120.57 (14)H17A—C17—H17B108.0
C10—C9—H9119.7N1—C18—C17109.80 (15)
C8—C9—H9119.7N1—C18—H18A109.7
C9—C10—C11120.48 (14)C17—C18—H18A109.7
C9—C10—H10119.8N1—C18—H18B109.7
C11—C10—H10119.8C17—C18—H18B109.7
O2—C11—C10118.59 (14)H18A—C18—H18B108.2
O2—C11—C12121.18 (14)C18—N1—C15109.09 (13)
C10—C11—C12120.23 (14)C18—N1—C14110.61 (13)
C13—C12—C11118.39 (13)C15—N1—C14111.86 (13)
C13—C12—C14121.74 (13)C11—O2—H1O108 (2)
C11—C12—C14119.80 (13)C16—O3—C17109.29 (13)
C12—C13—C8122.22 (13)C1—S1—C492.20 (9)
C12—C13—H13118.9
S1—C1—C2—C30.3 (3)C10—C11—C12—C14−177.78 (14)
C1—C2—C3—C40.4 (3)C11—C12—C13—C8−0.4 (2)
C2—C3—C4—C5178.40 (16)C14—C12—C13—C8176.60 (13)
C2—C3—C4—S1−0.9 (2)C9—C8—C13—C120.9 (2)
C3—C4—C5—C6179.33 (18)C7—C8—C13—C12177.50 (13)
S1—C4—C5—C6−1.5 (3)C13—C12—C14—N1140.07 (14)
C4—C5—C6—C7179.26 (15)C11—C12—C14—N1−42.94 (19)
C5—C6—C7—O1−13.9 (3)N1—C15—C16—O358.3 (2)
C5—C6—C7—C8165.08 (15)O3—C17—C18—N1−59.52 (19)
O1—C7—C8—C9166.04 (15)C17—C18—N1—C1556.66 (17)
C6—C7—C8—C9−12.9 (2)C17—C18—N1—C14−179.90 (13)
O1—C7—C8—C13−10.4 (2)C16—C15—N1—C18−55.98 (19)
C6—C7—C8—C13170.68 (14)C16—C15—N1—C14−178.68 (15)
C13—C8—C9—C10−0.3 (2)C12—C14—N1—C18167.76 (13)
C7—C8—C9—C10−176.70 (14)C12—C14—N1—C15−70.41 (17)
C8—C9—C10—C11−0.8 (2)C15—C16—O3—C17−59.5 (2)
C9—C10—C11—O2−178.50 (14)C18—C17—O3—C1660.1 (2)
C9—C10—C11—C121.3 (2)C2—C1—S1—C4−0.7 (2)
O2—C11—C12—C13179.13 (13)C3—C4—S1—C10.90 (15)
C10—C11—C12—C13−0.7 (2)C5—C4—S1—C1−178.40 (16)
O2—C11—C12—C142.0 (2)
D—H···AD—HH···AD···AD—H···A
O2—H1O···N10.83 (2)1.94 (2)2.6834 (18)149 (3)
C1—H1···O1i0.932.383.249 (2)156
C2—H2···O2ii0.932.573.417 (2)152
C5—H5···O10.932.452.786 (2)101
C16—H16A···Cg1iii0.972.883.789 (2)157
C18—H18B···Cg1iv0.972.703.6010 (18)154
  10 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Carbonic anhydrase inhibitors. Phenols incorporating 2- or 3-pyridyl-ethenylcarbonyl and tertiary amine moieties strongly inhibit Saccharomyces cerevisiae β-carbonic anhydrase.

Authors:  Sinan Bilginer; Elif Unluer; Halise Inci Gul; Ebru Mete; Semra Isik; Daniela Vullo; Ozen Ozensoy-Guler; Serap Beyaztas; Clemente Capasso; Claudiu T Supuran
Journal:  J Enzyme Inhib Med Chem       Date:  2013-07-01       Impact factor: 5.051

3.  1-(3-aminomethyl-4-hydroxyphenyl)-3-pyridinyl-2-propen-1-ones: a novel group of tumour-selective cytotoxins.

Authors:  Sinan Bilginer; Halise Inci Gul; Ebru Mete; Umashankar Das; Hiroshi Sakagami; Naoki Umemura; Jonathan Richard Dimmock
Journal:  J Enzyme Inhib Med Chem       Date:  2012-07-18       Impact factor: 5.051

Review 4.  Recent developments in biological activities of chalcones: a mini review.

Authors:  Parvesh Singh; Amit Anand; Vipan Kumar
Journal:  Eur J Med Chem       Date:  2014-08-12       Impact factor: 6.514

5.  Cytotoxic 5-aryl-1-(4-nitrophenyl)-3-oxo-1,4-pentadienes mounted on alicyclic scaffolds.

Authors:  Umashankar Das; H Inci Gul; Jane Alcorn; Anuraag Shrivastav; Theresa George; Rajendra K Sharma; Kurt H Nienaber; Erik De Clercq; Jan Balzarini; Masami Kawase; Noriyuki Kan; Toru Tanaka; Satoru Tani; Karl A Werbovetz; Adam J Yakovich; Elias K Manavathu; James P Stables; Jonathan R Dimmock
Journal:  Eur J Med Chem       Date:  2006-04-03       Impact factor: 6.514

6.  The inhibitory effects of phenolic Mannich bases on carbonic anhydrase I and II isoenzymes.

Authors:  Cem Yamali; Mehtap Tugrak; Halise Inci Gul; Muhammet Tanc; Claudiu T Supuran
Journal:  J Enzyme Inhib Med Chem       Date:  2016-01-10       Impact factor: 5.051

7.  Cytotoxic activity of 4'-hydroxychalcone derivatives against Jurkat cells and their effects on mammalian DNA topoisomerase I.

Authors:  Halise Inci Gul; Murat Cizmecioglu; Sevil Zencir; Mustafa Gul; Pakize Canturk; Mustafa Atalay; Zeki Topcu
Journal:  J Enzyme Inhib Med Chem       Date:  2009-06       Impact factor: 5.051

Review 8.  Mannich bases in medicinal chemistry and drug design.

Authors:  Gheorghe Roman
Journal:  Eur J Med Chem       Date:  2014-10-30       Impact factor: 6.514

9.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20

10.  The Cambridge Structural Database.

Authors:  Colin R Groom; Ian J Bruno; Matthew P Lightfoot; Suzanna C Ward
Journal:  Acta Crystallogr B Struct Sci Cryst Eng Mater       Date:  2016-04-01
  10 in total

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